book Exam Numerical Ability

The least number that must be subtracted from 63520
to make the result a perfect square, is:

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book Other Question

Sum of three digit number is 17. sum of squared of digits of the given num is 109. If we subtract 495 from that num we will get a number written in square order. find the num ? A man is known to speak truth 3 out of 4 times.He throws die and reports that it is a 6.The probability that it is actually a 6 is